[FlappyChicken]

I have an athlete, that every time they do the short sprint session
the HR is lower on the sprinting part than when they try to stay in zone 2 for the long run.

Could be that they a) don’t push themselves. b) a fault with HRM or something else?

Has anyone else experienced something similar?

[divitoca@gmail.com]

It might be because the HR is lagging (delay) on short sprints and might not register in that time frame.

[divitoca@gmail.com]

Is there a jump in the heart rate after the interval is over

[David Warden]

This is somewhat addressed in our Getting Started document, the relevant section below. It’s not exactly what you describe, but the take-home is the same: don’t use HR for high intensity intervals, use Pace or Power.

Q: With high-intensity short Zone 4 and 5 intervals, my heart rate can’t “catch up”.

A: This is addressed in our documents Understanding Your 80/20 Run Plan and Understanding Your 80/20 Triathlon Plan. Because HR is a lagging indicator, Pace and Power are more reliable methods at high intensities. Absent Pace and Power, RPE should be used for Zone 4 and 5. This issue can also be resolved by using the 80/20 Run and Bike Zones Garmin App, where you can have both real-time HR and your custom 80/20 Pace or Power zones displayed on your device at the same time.

David

[Author]

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